Like a lot of people right now, I have been functioning from residence and also using home-made face masks to aid slow down the spread of COVID-19 whenever I head out on vital duties. I believed it would be interesting to make use of a tool like SOLIDWORKS Flow Simulation to see the difference these types of masks can make. Contrary to what you might think, it is surprisingly very easy to establish these sorts of simulations. I hope this short article will help get rid of some of that scare tactics and urge you to experiment too.
Before we dive in, I wish to include the disclaimer that what I’m likely to cover only scratches the surface of what is feasible utilizing this device. There are numerous variables and also options to be considered that I can not cover them all. Ideally, this will certainly influence others to check out choices to the example I have done and also share their findings.
Step 1: A Face Model to Develop From
For this task, what we are doing in manufacturing terms is crafting a component to fit onto an existing part. In this instance, a human face. For a beginning version, I made use of a 3D check that I took of my face making use of an Artec Area Spider. Nevertheless, you can equally as conveniently make use of a model you download and install off of a website like GrabCAD.
Step 2: Composing a Mask Layout Over the Version
As soon as I imported the face design into SOLIDWORKS CAD, I began to draw the base version making use of splines that roughly matched the external contours of my face. These did not have to be perfect considering that the final product (constructed from fabric) would certainly not be ideal either. To start, I used cross-sections of the design around my nose and also chin. Then I developed a healthy body using a boundary surface area to connect them as well as include density.
Step 3: Adding a “Mouth.”
I changed my face design with a little extruded cut at the mouth to use it as the inlet for the flow research study to represent my breath.
Step 4: Setting Up the Research Study Parameters.
For this kind of test, the setup I made use of as a standard. I made use of the Flow Simulation Wizard with nearly all the default setups for an external flow study.
Analysis type: External.
Functioning fluid: Air (Pre-Defined) with Moisture enabled.
Inlet Quantity Flow: 0.0005 m ^ 3/s ( approx. speed of human breath).
One modification I made was to reduce the default computation domain name around my model. By default this allows, so to speed up computational time, I diminished it to just the location around the front of the face.
Step 5: Setting Up the Study Product.
I wanted to call out this action individually as this is probably the action that someone would certainly end up changing one of the most as they experiment. In this case, choosing the Porous Tool would represent the product used to produce the face mask.
For this details example, I did my best to get in the values I thought would best stand for T-shirt fabric material. As you can visualize, there is a plethora of materials you can check in this scenario, as well as my values are just an estimate. Finding the mesh settings was a particular challenge given that you have to discover a density you can determine with but will not take an excessive quantity of time to solve.
Step 6: Taking A Look At Outcomes.
Looking at the results, we can see that there is a certain influence from wearing the mask. As you can see, a good amount of the air movement is going through the front of it. There are additionally some tiny leaks around the spaces near my nose and chin, which matched pretty well with my real-life experiences and also having my glasses fog up when I used the prototype.
For contrast and also control, I ran the study with the same parameters yet without the mask design and also you can see a significant difference.